Vibrational modes of a modern Chinese two-tone bell

The vibrational modes of an almond-shape bell from the Suzhou Musical Instrument Factory were studied using holographic interferometry.The non-circular shape results in mode pairs,one pair member having a mode at the xian or spine of the bell,the other an antinode.The two lowest modes have a frequency ratio of 1188,close to that of a minor third (1.189),due in part to six tuning grooves cast into the bell.